Tool-coupling means



Da. 1s, 192s. 1,695,565

c. s. THOMAS Toon coUPLING MEANS Filed Feb. 26, 1927 INVENTOIL y @mmHg/c4143 E? @@@MW A TTORNEY Patented Dec. 18, 1928.

g onirico srares OHARLEsis. fr'ir'oivr'As,l OF SANv ADinero, CALIFORNIA.

' ,'roeircorrrr.fue,ii/maiis. Y

i Application filed February 26, 1927.. Serial No, 171,223.

My invention relates to couplings, more particularly to coupling' means for tools such as braces andrbits or the like, and the objects of my invention-are: first, to provide a device of this classin which the tool may be easily and quickly clamped by the tool coupling and easily and quickly released thereby; second, to provide a device ofthis class in which the parts are reduced toav minimum and yet provide a rigid, strongand substantial coupling; third, to provide a device of this class in which the tool will not loosen but will hold the tool rigidly ,andin alinement even when roughly used; fourth, to provide a device of this class which provides a positive gripon'the tool; fifth, to provide a tool coupling of this class in which the parts may be made small enough so that it can readily follow anextensiondrill of ordinary size, and sixth, to providea device of this class which is economical of lconstruction, sturdy, durable, and which will. not

Y readily deteriorate or get out. of order.

. With these and other objects in view, as will appear hereinafter, myinvention con sists of certain novel features of construe tion,rcombination and arrangement of parts and portions, as will be hereinafter described in detail Vand particularly set forth in the appended claims, reference being 'had' to the accompanying drawingsl and tothe characters of reference thereon, which form a part of this application, in which:

-Figure l is an elevational v1ew. of, my tool l coupling means vin its operative position; Fig. 2 is a sectional view thereof through 2 2 of Fig. 1, with parts and portions shown in Velevation to facilitate the illustration; Fig. 3 is a sectional viewon an enlargedscale through 3 8 of Fig. 2, with parts and portions shown in elevation toy facilitate vthe illustration; Fig. 4 is an endview from the line 4-4 of Fig. 2"with the bit or tool removed; 5 `is a rear end view of the tool, and Fig. 6 is a fragmentary elevational view on' a plane with 6-6 of Fig. 3

outer sleeve removed.

Like characters of reference' refer to similar parts and portionsthroughout the ,sev-V The brace member 1, of which only a" fvagmsi'iais shown, may be either power'r and with thev i l f until they assume the position shown by the hand driven. Neartheextremity ofthe rar-sai: erica-'1 brace member l is a'y transverse round hole l i" with a il-shaped cutout portion lb extendingto the extremity of the brace member, as

best shown in Figs.J 2 and 4 ofthe drawings.

rlfhe end of'thejbit member 2 is tapered vand square.` Its` extremity `is cut away, leaving -a rounded portion 2L and a flat- V-shaped'.

portion 2b, which coincide with theportions l? and 1b of the brace member l, respectively,

'asbest shown ir. Figs. 2 and 'of the drawings.` The sleeve member slides over the joint between the brace member 1 and the bit member 2 and has a square tapered aperture 3l at its extremity, which vreceives the bit 2. This square portion mergesfinto the central circular hole 8b, which extends the rest of thelength `ofthe sleeve. The inner sleeve member 3 is valso provided Awith slots 3", which receive the, pin 5, which is rigidly secured in the hole lc of the brace member l.

The slots 3C andthe p in 5' take'the strain Volf the joint between themembers 1 and 2. The

brace endof the sleeve 3 is 'provided with threads 3d. best shown 'in' Figs.2.and 6 of the drawings. rThe sleeve 3 rality of slotsBe in spaced relation, which extend the length ofthe threads 3d and` permit the sleeve portion between said-.slotse to be forced againstthe'braee member 1 by the tapered portion ofthe outer sleeve member 4. The outer sleeve member 4vts over threaded portions Ll'ftand 3d serve as wedges.

Therefore, screwing the outer 'collarmems ber 4 ontothe 'inner collar member 3,1the threaded portions' 3d of the collar member '3 are forced against the brace member land grip it securely. To place a bit in this coupling means the outer Vcollar member y4V is loosened so that the-inner collar member 3 does not grip the brace l and `the two collar These 'threads are tapered,v as". y

vis alsolprovidedwith a plumembers are slipped back on the vbrace VY1 4ner collar member fits snugly around-the bit end, the outer collar member is turned so that the inner collar member is forced against the brace member l, and the devies than ready for use.,

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wishA to be limited to this particular construction, combination and arrangement, but.

desire to include in the scope of my invention, the construct-ion, combination and arf-4 .rangement substantially as Vset forth in the coneentrie sleeves over the jointe of said shankI and tool.

2. A` device of the class describedinelud ing a shanlna toohnieans foriinterlocking saidshank and tool, a; plurality of concentric slidably mounted sleeveson saidshank, and means for locking saidconcentric sleeves over the-joint of said' shank. andv tool, said locking-means consisting of tapered threads between, said concentric sleeves and means fori turning the outer-sleeve in relation to the inner sleeve.- i

3i A device of the class described, includingaI shank With a cutout V-shaped slot! `in said shanktvvith a cutout circular portion at the apex of saidfVfshapedslot, a tool with a Vfshaped and cylindricaliportion;adapted to coincide `with: said Vs-shaped and? circular cutout portiornof saidA shank, a plurality of concentric sleeves slidably mounted on said shank, and means` foru locking, said sleeves i over the joint. of saidtool and shank.4

4i A device of' theclass described,.includ ing` a shank with aA cutout Vlshaped' slot in said shank with acutout circular portion at the-apex of said V-shaped'slot, atooliwitha V-shaped-and cylindrical'portion adapted-to coincide with said V-shaped and circular cutout portion of said, shank-,a plurality of concentricsleeves slidably` mounted on said shank, and means for locltingrl said sleeves over the joint of said tool and shank, said locking means consisting oftaperedithreads between said concentricsleeves, and means for turning the outer'sleeve in relation to the inner sleeve.

i In a toolcoupling, a shankand atool interlocked with eachother, anfinner sleeve mounted over the joint provided with` a tapered square-shaped portion atone end adapted to fit the shank of? the tool and with a tapered, externally threaded, slotted por- -tion at its other end and provided with i ing rounded and V-shaped` portionadapted y tof lit tightly` therein, anV inner sleeve provided` with, a tapered square-shaped portion at. one end` andA withy a tapered;l externally threaded, slotted. portion at `its other end andprovided, with slots in` its sides,a pin mounted: in` said shank and'extending into said slottrand anouter sleeveiadapted to tit over the inner sleeve andi provi ded. ivith internal tapered threadsadapted to fit. the ex.- ternal thneads ofi said. innen sleeve.

7i In a1 toolcoupling, a` brace shank and a tool intnrlocked' With each, other, an inner sleeveimounted over t-hejoint provided with a. tapered portion atone end adapted telit the tapered shankA oithetool, andiv with an externally3 tapered pontion at its opposite end provided with ,slots` in` its: sides,jkey means connecting' said sleeve with saidbrace shank topreventtrelative rotary movement, a

andiamouter sleeve adapted to fit over said inner sleeve and provided with any internal taperedzpoitionaadapted toiengage and con,- tractf the externals tapered` portion oit. said innen sleeve,r

8 In atool coupling, a brace shankand a tool interlocked` Wit-h4 each other, and inner sleeve means mounted over thejoint provided wiitlr` portion. at' one endJ adapted toitl the shankxofy the ftooLandiW-ith a slotted tapered portion near itsvono ond and with an externally threaded portionat said: end, key means connecting; said brace shank and inner sleeve meanstoprevent relative rotary movement, and an outer sleeve adapted to titi over saidinnen'slwve andprovided with an internal tapered. portion. adaptedto engage saidexternal tapered` portion on said inner sleeve means andi provided with internalthneads adapted tol fit the external threads on said inner sleeve l means.

In testimony whereof, 'L have hereunto `set my handat SanfDiego, Californimthis 17th day of February, 1927.. i 

